Question

Scientists take scientific measurements carefully in order to ensure their reliability and validity. What is the difference between accuracy and precision in scientific measurements?
a. Accuracy is how far out the measurement is taken, while precision is how close a measured value is to its true value.
 
b. Accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other.

c. Accuracy is how close a measured value is to its true value, while precision is how close the average value is to the true value.

d. Accuracy and precision are two different words for the same thing.

Answer 1

The right answer is b. Accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other.

Think about the Shot grouping. You need to get that projectiles impact the target from multiple shots shots taken in one session. In this way, if you want to win, you need to be accurate and precise. In the Figure below is represented four different ways in this sport.

Answer 2

I believe the correct response is B.